The most comprehensive User Management Platform
Need more than just a sign-in box? Clerk is a complete suite of embeddable UIs, flexible APIs, and admin dashboards to authenticate and manage your users.
Trusted by fast-growing companies around the world
Clerk Components
Pixel-perfect UIs, embedded in minutes
Simply add <SignIn/>, <SignUp/>, <UserButton/>, <UserProfile/> for complete user management functionality. Match to your brand with any CSS library, then deploy to your own domain — no more jarring redirects!
Everything you need for authentication
Ever feel like authentication requirements change with the season? Clerk keeps up with the latest trends and security best practices.
Multifactor Authentication
Each user's self-serve multifactor settings are enforced automatically during sign-in.
Fraud and Abuse Prevention
Reduce fraudulent sign-ups and free trial abuse by blocking high-risk disposable email domains and restricting the use of email subaddresses with the “+” separator.
Advanced security
Clerk is SOC 2 type 2 certified and CCPA compliant. We conduct regular third-party audits and penetration tests.
Session Management
Clerk manages the full session lifecycle, including critical security functionality like active device monitoring and session revocation.
Social Sign-On
Add high-conversion Social Sign-on (SSO) to your application in minutes. 20+ options and growing.
Bot Detection
Dramatically reduce fraudulent sign-ups with built-in, continually updated machine learning.
Email and SMS one-time passcodes
Fast and reliable one-time passcode delivery with built-in brute force prevention.
Magic Links
Improve sign-up conversion rates and filter out spam/fraud with Magic Links.
Passwords
Simple and secure password authentication, complete with breach detection and recovery options.
Frameworks
Seamless SDKs for modern frameworks
Clerk keeps developer experience front-and-center by providing helpful SDKs for most modern frameworks on web and mobile.
All frameworks
Integrations
Integrations with the tools you love
Leverage Clerk as the source of truth for your user data and seamlessly integrate with the tools that you already depend on.
All integrations
B2B SaaS Suite
The easy solution to multi-tenancy
Clerk has all the features you need to onboard and manage the users and organizations of your multi-tenant SaaS application.
Learn more about Clerk B2BCustom roles and permissions
Powerful primitives to fully customize your app's authorization story.
Auto-join
Let your users discover and join organizations based on their email domain.
Invitations
Fuel your application's growth by making it simple for your customers to invite their team.
Organization UI Components
Clerk's UI components add turn-key simplicity to complex Organization management tasks.
What people are saying
Trusted by startups and the world's largest companies
Join the growing number of customers and champions who trust Clerk for authentication and user management.
The best practices built-in to their <SignIn/> and <UserProfile/> components would take months to implement in-house, yet no sacrifice is made in terms of Enterprise extensibility or customization to your brand.
- Name
- Guillermo Rauch
- Role
- CEO
- Company
- Vercel
Clerk feels like the first time I booted my computer with an SSD. It’s so much faster and simpler that it changed how I do things.
- Name
- Theo Browne
- Role
- CEO
- Company
- Ping Labs
After spending many hours on auth issues that seemed simple (but were not), we moved to Clerk and all that burden was lifted. We kind of wish we’d made that decision earlier.
- Name
- Julian Benegas
- Role
- CEO
- Company
- BaseHub
Clerk let us spin up a new product in hours instead of weeks. As a company that deeply values developer velocity— Clerk is exactly what we needed.
- Name
- Kevin Van Gundy
- Role
- CEO
- Company
- Hypermode
We’re big admirers of what the @ClerkDev team are building and looking forward to working more closely with them.
- Name
- Patrick Collison
- Role
- CEO
- Company
- Stripe
Clerk’s integration gives Supabase developers another incredible option for handling authentication. And the Clerk team are a pleasure to work with.
- Name
- Paul Copplestone
- Role
- CEO
- Company
- Supabase
We were able to ship MFA, SSO, and SAML for our customers in a fraction of the time. Now, we have improved security and must-haves for enterprise prospects.
- Name
- Dan Farrelly
- Role
- CTO
- Company
- Inngest
Managed to integrate AppSync with @ClerkDev over the weekend. Implementing a Lambda authorizer with Clerk’s Go SDK was super easy.
- Name
- Mathias Lafeldt
- Role
- Founder
- Company
- Grafbase
Start now, no strings attached
Integrate complete user management in minutes. Free for your first 10,000 monthly active users and 100 monthly active orgs. No credit card required.